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Overseas Pollution Hitting the U.S.

Atmospheric Scientists and Engineers Demonstrate Amount of Pollution in U.S. Originating Overseas

July 1, 2008

Environmental scientists and engineers developed mathematical models to calculate the impact of pollution from Europe and Asia on areas in the United States. They found that almost twelve percent of pollution in the western U.S. comes from those countries, as opposed to about ten percent in the eastern U.S. Research showed that the largest impact of this pollution occurred in the spring and fall, though most of the problem is due to U.S. produced pollution.

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ABOUT OZONE: Ozone is a rare component of our atmosphere; there are about three molecules of ozone per every 10 million air molecules, and yet it plays a vital role in human health. Most ozone (90%) can be found in an upper layer of the earth's atmosphere called the stratosphere. It is beneficial because it absorbs most of the damaging ultraviolet sunlight, which can cause skin cancers, among other conditions. The remaining 10% of ozone can be found in a lower region called the troposphere. Here, it reacts with other molecules to produce smog, which has toxic effects on crops, forest growth, and human health.

SMOG MAKES BREATHING DIFFICULT: Smog is generally formed when ground level ozone, fine particles and other chemicals react on hot days. Smog and other pollution can trigger asthma attacks. Smog can make breathing difficult and make human beings more susceptible to cardio-respiratory diseases. People already suffering from heart or lung disease are particularly affected. The two main ingredients in smog that affect human health are ground-level ozone and fine airborne particles.

The American Meteorological Society, the American Geophysical Union, INFORMS, the American Mathematical Society, and the Mathematical Association of America contributed to the information contained in the TV portion of this report.

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To Go Inside This Science:
Prof. Tracey Holloway
Center for Sustainability and the Global Environment
University of Wisconsin-Madison
608-262-5356
taholloway@wisc.edu

American Meteorological Society
Boston, MA 02108-3693
617-227-2425

American Geophysical Union
Washington, DC 20009-1277
1-800-966-2481

American Mathematical Society
Providence, RI 02904-2294
1-800-321-4267

Mathematical Association of America
Washington, DC 20036-1358
1-800-741-9415


© 2008 American Institute of Physics